/Engine/Plugins/Animation/RigLogic/Source/RigLogicLib/Public/dna/layers/GeometryWriter.h
The mesh storage will be implicitly resized (if needed) to provide storage for the number of meshes that is inferred from the specified index.
void setVertexTextureCoordinates ( std::uint16_t meshIndex, const [TextureCoordinate](API\Plugins\RigLogicLib\dna\layers\TextureCoordinate) * textureCoordinates, std::uint32_t count )